Piston-packing.



No. 859,328. PATENTED JULY 9, 1907. G P MOMULLEN PISTON PA GKINGR PPLTOATION FILED D30 12, 1906 llllmlf minus IIIIII I III IIIIIIIIIIIIIllIl IIIIIIIIIIIIIIII' I ll IIIII III-II i ll" IIIIIIIIIIIIIIIIIIIIIIII 1|| IIIIIIIIIIIIIIII nourish. s rs rns PATEE @Fli liilli.

CHARLES P. -M0MULLEN, 9F BRJOKLYN, NEW YORK Application filed December 12,

cation, such as will enable those skilled in the .ori t which it sppertnins to make and use the same.

This invention relates to means for packing pistons used in steam, hydraulic oi similar apparatus, and

' the object thereoi isto provide v ed packings for pistons of this class wh i h are operated and made effectual by. pressure applied to the pressure end or ends of the piston, said pressure being applied by means or stesm, water, or other substance on or in connection with which the piston operates.

The invention is fully disclosed in the following specification, of which the accompanying drawing forms 1L part, in which the separate parts of my improvement are designated by' suitable rcference characters in each oi the views, and in which;

Figure 1 is a sectionnlelevsiion of at part oi an automatic pump governor having two pistons provided with different forms of my improved packing :ind one of which operates in a steam and the other in a hydraulic cylinder; Fig. 2 a similar view of a part of a pump apparatus domprising a. steam and a hydraulic cylinder having connected pistons showing different forms of my improved pricking; Fig. 3 a. side view of a packingring which I employ; find, Fig. 4 a similar view of a piston ring in connection with which the packing ring is employed.

in Fig. l of the drawing, .l have shown it part of what is known as the ideal pump governor com prising a steam throttle valve casing a and ti hydraulic cylinder 1). The valv'e casing a is provided with a cylinder 0., and connected with the cnd of the hydraulic cylinder 1) opposite the valve casing a ,a

Water supply pipe b'-'. The parts of this device above (inscribed are connected by a central frame a through which is passed a. piston and valve rod a, and the piston and vnlverod of within the cylinder (1 is providcd with n piston a, and saidpistonnnd valve rod within the hydraulic cylinder 1) is provided with a piston 11. The piston 0 comprises conical body poi- Lion P on which is mounted a conically tapered ring r having it flange v on the end thereof adjacent to the valve casing (druid the ring c, a. side view of which is given in Fig. 4, is held in place by a plate (35 provided with ports or passages 1- through which prcssurc of tho'stcam is applicdto 'the ring a. Mounted on .ihe ring c' are pnckingrings c of ordinary form,

ind one of which is shown in Fig. 3, said rings being "of the ordinary split ring type, and the piston is pro- 55.

vided at the end thereof opposite the pl-sites'c with Specification of Letters?axte nt.

Potent-ed July e, i907.

1906. Serial in. 347,395.

another plate c by Wnich the rings 0'' are held in positionv Vith this torm of peeking, at eachinovemenr. oi the piston in. the direction of the valve casing chum; her a", the pressure of the storm: posses through POTLB or passages c" and forces thering c in the direction of the opposite end of *he piston. ,l Cl this operation of said ring the packing gs c as will be readily understood, and when the piston u move l in he opposite direction the expansion of the ring cf" is released. to s slight extent. Wl'liCllEllablGS the piston to move more freely in said direction.

Thewpiston (2, Within the hydronlic cylinder b, cornprises'o hollow conical body portion d on which are placed packing rings (1 composed of fibrous mnteriol', said pecking rings being shaped in cross section-to correspond with the conical body portion d oi the piston, the smaller end of which is directed towsrdthe water supply pipe b and the packing rings (i are held in place by a plate d zit said end of said piston, end said plate is provided with ports or passages i through which pressure is applied to the packing rings (1, and in this operation said pscliing rings are compressed and expnnded laterally and this ca'tuses tight packing and tight fit of the piston in the cylinder when ssr d piston moved in the direct-ion of the water supply pipe 5-, but when said piston moves in the opposite direction the pressure on the packing rings ti" is relieved to an. extent I ideal' 'overnor hereinbeiore referred to..

in Fig. 2. l hive shown the cylinders oi a pump. a being a steam cylinder andfzi writer or hydraulic cylin der, and these cyliiiders he provided with a piston rod 7 the end of which within the steam cylinder 0 is pro vided with a piston h and the other end within the hydraulic cylinder f with a piston i. Thepiston 72 comprises a body pori on 71F conicnlly tapered at both ends and provided centrally with an annular flange h, and on cachend of the body portion 12 is 1!, clinically tapered ring a similar to that shown in Fig. l, and on each of the rings c placed packing rings r" similar to those shown in Fig. 1. At each end of ihe piston h is a plate If providerjl with poi'is or pin 1'1 Tho'cylinder e is also provided at each end with a steam inlet 0 and a steam exhaust 0", -ind in ihe movement oi the piston it toward either end of the cylinder the steam passes in through the ports or passages h at the corresponding end oi the piston, the corresponding ring a is :orced fa-miller onto the body portion 11" oi the piston and. thecotresponding packing-rings are expanded, thisopcration being the sumo as with the piston o shown in Fig. 1, ex

' form ol the piston rings are mountccl seems cept thatthe piston 71 i s. double ended piston and provided at both ends with the rings The pistdn i, in the hydraulic cylinder f is a modified h and comprises a cylindrical body portion 1'' on which is mounted a supplemental member or casing-i con'ically tapered at both ends and provided with a central annularfiange 1'. and

on the opposite ends hf which packing ringed similar to those shown in Fig. "rare placed. The piston t is also provided at its op-. posite ends with plates ifhaving ports or passages i,

and when said piston is moved toward either end oi the cylinder the pressure in said end oi the cylinder exerted through the ports or passages i" expands the packing rings 11" on the corresponding end ot' the piston and causes the said rings to closely lit the cylinder, and when, the piston moves in the opposite direction, this I pressure on the said rings is released and the packing rings on the other end oi the cylinder are compressed end expanded.

The packingrings are preferably composed of meta c and packing rings 0 p and" the packing rings (1 are composed of [throne material and are not split rings.

. r n The inner dmm eter or the plSiltlll rings a is oi slightly .u lessdlmens ons than the outer diameter 0! the ronrcal or tapered part of ment of said rings necessary the body of the pistonon which said and this allows oi the slight move in the operations thercol'nsherein'described, and'in prnctii e I also prefer to placc' between the inner ends oi said rings and the flange It spiral springs j which normally hold said ririgsat the limit of their outward movement, and while the springs j are only shown in'Fign 2 it will be understood that they may also he applied to the construction shotvnin -Fig= l,'i1' desired.

In Fig.2,

l have not shown the means for controlling the inlet and exhaust oi the steam and water to tho cyl inders ,eand f as they lorm no part. ol this invention I 1' v v which relates-only to the means tor packing the pistons.

My improved moans tor'packin z a piston isnot' 'imrted to the various ior rnsoi construction shown nor to any l particular apparatus and the some may he ernployctl in l l l l l i t l l r l connection with steam, hydraulic or similar apparatus.

wherever used.

Having lolly describedmy invention. when. l claim asnew and desire to secure by Letters Patent. is:-'

1. A piston. comprising a tapered body portion and end plates connected therewlth, and compressible nndexpnnslhle poclrlng rlngs placed on sold conical portion of the piston rind tapered in cross section to correspond \vlth the tnper thereof. the end plate-at the smaller end of the tapered portlon of the piston being passages through whlch pressure from the cylinder ln which the plston'ls placed Is applied to the side face of the provlded with ports or' adjacent packing ring. and "sold packing rlmzs helm: rnov- -nhle longitudinally of the piston and on the conlczil portlon thereof.

2. A piston provided wlth a hotly port-lon which "ls taperetl ln both-directions. end plates secured to sold body portion and whlch substantially fit the c'yllnder in which the piston is placed. compressible and expnnslhle packing rlnes'plncednn -hoth ends of the tapered body portion of the nlston, said rlngs heing tapered in cross section to correspond wlh the inner at theopposlte ends of the body porllon or .he piston and sold end plates being. provided with ports or passages through which pressure from the cylinder is applied to the sldc' tapes of the adjacent pnck in rings. and sold packing rings lielng movable long.- tudlnnlly ot the platen and entire conical portion thereof:

'24. A piston prorldcd with pcrcd in both dlrectlons. end plates secured to said hody portion and which substantially fit the'eyllnder in which the piston is placed.compressible and expnnslhle packing rings plnccd on hoth ends of the tapered body portion ol 'lhc piston. snltl rln rs helm: tapered in cross section to corrt-spontl' with the taper at the opposite ends of the body portion o lhc p lY-lton. and said end plates being provided with ports or pnssnges through which prssur'efrom the c \'lill(lc'F is applied to the side my; rings. siald packing rlnns'helng m'ovnble longitudinally of the piston and on the conical portion thereof. said to-' faces of the. adjacent patch-- n'liody portion which is tn-.

head or flange by which the 

